Chekh , O., Bordunova , O., & Chivanov , V. (2020). Influence of protection with protective drugs based on chitosan-copper complexes on reduction of weight of food chicken eggs during storage. Bulletin of Sumy National Agrarian University. The Series: Livestock, (4(43), 122-127. https://doi.org/10.32845/bsnau.lvst.2020.4.18